113 	struct btrfs_root *root, *tmp;  in switch_commit_roots()  local
116 	list_for_each_entry_safe(root, tmp, &trans->switch_commits,  in switch_commit_roots()
118 		list_del_init(&root->dirty_list);  in switch_commit_roots()
119 		free_extent_buffer(root->commit_root);  in switch_commit_roots()
120 		root->commit_root = btrfs_root_node(root);  in switch_commit_roots()
121 		if (is_fstree(root->objectid))  in switch_commit_roots()
122 			btrfs_unpin_free_ino(root);  in switch_commit_roots()
123 		clear_btree_io_tree(&root->dirty_log_pages);  in switch_commit_roots()
129 		root = list_first_entry(&trans->dropped_roots,  in switch_commit_roots()
131 		list_del_init(&root->root_list);  in switch_commit_roots()
133 		btrfs_drop_and_free_fs_root(fs_info, root);  in switch_commit_roots()
295 			       struct btrfs_root *root,  in record_root_in_trans()  argument
298 	struct btrfs_fs_info *fs_info = root->fs_info;  in record_root_in_trans()
300 	if ((test_bit(BTRFS_ROOT_REF_COWS, &root->state) &&  in record_root_in_trans()
301 	    root->last_trans < trans->transid) || force) {  in record_root_in_trans()
302 		WARN_ON(root == fs_info->extent_root);  in record_root_in_trans()
303 		WARN_ON(!force && root->commit_root != root->node);  in record_root_in_trans()
310 		set_bit(BTRFS_ROOT_IN_TRANS_SETUP, &root->state);  in record_root_in_trans()
318 		if (root->last_trans == trans->transid && !force) {  in record_root_in_trans()
323 				   (unsigned long)root->root_key.objectid,  in record_root_in_trans()
326 		root->last_trans = trans->transid;  in record_root_in_trans()
347 		btrfs_init_reloc_root(trans, root);  in record_root_in_trans()
349 		clear_bit(BTRFS_ROOT_IN_TRANS_SETUP, &root->state);  in record_root_in_trans()
356 			    struct btrfs_root *root)  in btrfs_add_dropped_root()  argument
358 	struct btrfs_fs_info *fs_info = root->fs_info;  in btrfs_add_dropped_root()
363 	list_add_tail(&root->root_list, &cur_trans->dropped_roots);  in btrfs_add_dropped_root()
369 			     (unsigned long)root->root_key.objectid,  in btrfs_add_dropped_root()
375 			       struct btrfs_root *root)  in btrfs_record_root_in_trans()  argument
377 	struct btrfs_fs_info *fs_info = root->fs_info;  in btrfs_record_root_in_trans()
379 	if (!test_bit(BTRFS_ROOT_REF_COWS, &root->state))  in btrfs_record_root_in_trans()
387 	if (root->last_trans == trans->transid &&  in btrfs_record_root_in_trans()
388 	    !test_bit(BTRFS_ROOT_IN_TRANS_SETUP, &root->state))  in btrfs_record_root_in_trans()
392 	record_root_in_trans(trans, root, 0);  in btrfs_record_root_in_trans()
439 static inline bool need_reserve_reloc_root(struct btrfs_root *root)  in need_reserve_reloc_root()  argument
441 	struct btrfs_fs_info *fs_info = root->fs_info;  in need_reserve_reloc_root()
444 	    !test_bit(BTRFS_ROOT_REF_COWS, &root->state) ||  in need_reserve_reloc_root()
445 	    root->root_key.objectid == BTRFS_TREE_RELOC_OBJECTID ||  in need_reserve_reloc_root()
446 	    root->reloc_root)  in need_reserve_reloc_root()
453 start_transaction(struct btrfs_root *root, unsigned int num_items,  in start_transaction()  argument
457 	struct btrfs_fs_info *fs_info = root->fs_info;  in start_transaction()
486 	if (num_items && root != fs_info->chunk_root) {  in start_transaction()
488 		ret = btrfs_qgroup_reserve_meta_pertrans(root, qgroup_reserved,  in start_transaction()
497 		if (need_reserve_reloc_root(root)) {  in start_transaction()
502 		ret = btrfs_block_rsv_add(root, &fs_info->trans_block_rsv,  in start_transaction()
546 	h->root = root;  in start_transaction()
548 	h->fs_info = root->fs_info;  in start_transaction()
571 	btrfs_record_root_in_trans(h, root);  in start_transaction()
586 	btrfs_qgroup_free_meta_pertrans(root, qgroup_reserved);  in start_transaction()
590 struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root,  in btrfs_start_transaction()  argument
593 	return start_transaction(root, num_items, TRANS_START,  in btrfs_start_transaction()
598 					struct btrfs_root *root,  in btrfs_start_transaction_fallback_global_rsv()  argument
602 	struct btrfs_fs_info *fs_info = root->fs_info;  in btrfs_start_transaction_fallback_global_rsv()
613 	trans = start_transaction(root, num_items, TRANS_START,  in btrfs_start_transaction_fallback_global_rsv()
618 	trans = btrfs_start_transaction(root, 0);  in btrfs_start_transaction_fallback_global_rsv()
638 struct btrfs_trans_handle *btrfs_join_transaction(struct btrfs_root *root)  in btrfs_join_transaction()  argument
640 	return start_transaction(root, 0, TRANS_JOIN, BTRFS_RESERVE_NO_FLUSH,  in btrfs_join_transaction()
644 struct btrfs_trans_handle *btrfs_join_transaction_nolock(struct btrfs_root *root)  in btrfs_join_transaction_nolock()  argument
646 	return start_transaction(root, 0, TRANS_JOIN_NOLOCK,  in btrfs_join_transaction_nolock()
663 struct btrfs_trans_handle *btrfs_attach_transaction(struct btrfs_root *root)  in btrfs_attach_transaction()  argument
665 	return start_transaction(root, 0, TRANS_ATTACH,  in btrfs_attach_transaction()
677 btrfs_attach_transaction_barrier(struct btrfs_root *root)  in btrfs_attach_transaction_barrier()  argument
681 	trans = start_transaction(root, 0, TRANS_ATTACH,  in btrfs_attach_transaction_barrier()
684 		btrfs_wait_for_commit(root->fs_info, 0);  in btrfs_attach_transaction_barrier()
1091 			       struct btrfs_root *root)  in update_cowonly_root()  argument
1096 	struct btrfs_fs_info *fs_info = root->fs_info;  in update_cowonly_root()
1099 	old_root_used = btrfs_root_used(&root->root_item);  in update_cowonly_root()
1102 		old_root_bytenr = btrfs_root_bytenr(&root->root_item);  in update_cowonly_root()
1103 		if (old_root_bytenr == root->node->start &&  in update_cowonly_root()
1104 		    old_root_used == btrfs_root_used(&root->root_item))  in update_cowonly_root()
1107 		btrfs_set_root_node(&root->root_item, root->node);  in update_cowonly_root()
1109 					&root->root_key,  in update_cowonly_root()
1110 					&root->root_item);  in update_cowonly_root()
1114 		old_root_used = btrfs_root_used(&root->root_item);  in update_cowonly_root()
1169 		struct btrfs_root *root;  in commit_cowonly_roots()  local
1172 		root = list_entry(next, struct btrfs_root, dirty_list);  in commit_cowonly_roots()
1173 		clear_bit(BTRFS_ROOT_DIRTY, &root->state);  in commit_cowonly_roots()
1175 		if (root != fs_info->extent_root)  in commit_cowonly_roots()
1176 			list_add_tail(&root->dirty_list,  in commit_cowonly_roots()
1178 		ret = update_cowonly_root(trans, root);  in commit_cowonly_roots()
1210 void btrfs_add_dead_root(struct btrfs_root *root)  in btrfs_add_dead_root()  argument
1212 	struct btrfs_fs_info *fs_info = root->fs_info;  in btrfs_add_dead_root()
1215 	if (list_empty(&root->root_list))  in btrfs_add_dead_root()
1216 		list_add_tail(&root->root_list, &fs_info->dead_roots);  in btrfs_add_dead_root()
1240 			struct btrfs_root *root = gang[i];  in commit_fs_roots()  local
1242 					(unsigned long)root->root_key.objectid,  in commit_fs_roots()
1246 			btrfs_free_log(trans, root);  in commit_fs_roots()
1247 			btrfs_update_reloc_root(trans, root);  in commit_fs_roots()
1249 			btrfs_save_ino_cache(root, trans);  in commit_fs_roots()
1252 			clear_bit(BTRFS_ROOT_FORCE_COW, &root->state);  in commit_fs_roots()
1255 			if (root->commit_root != root->node) {  in commit_fs_roots()
1256 				list_add_tail(&root->dirty_list,  in commit_fs_roots()
1258 				btrfs_set_root_node(&root->root_item,  in commit_fs_roots()
1259 						    root->node);  in commit_fs_roots()
1263 						&root->root_key,  in commit_fs_roots()
1264 						&root->root_item);  in commit_fs_roots()
1268 			btrfs_qgroup_free_meta_all_pertrans(root);  in commit_fs_roots()
1279 int btrfs_defrag_root(struct btrfs_root *root)  in btrfs_defrag_root()  argument
1281 	struct btrfs_fs_info *info = root->fs_info;  in btrfs_defrag_root()
1285 	if (test_and_set_bit(BTRFS_ROOT_DEFRAG_RUNNING, &root->state))  in btrfs_defrag_root()
1289 		trans = btrfs_start_transaction(root, 0);  in btrfs_defrag_root()
1293 		ret = btrfs_defrag_leaves(trans, root);  in btrfs_defrag_root()
1308 	clear_bit(BTRFS_ROOT_DEFRAG_RUNNING, &root->state);  in btrfs_defrag_root()
1415 	struct btrfs_root *root = pending->root;  in create_pending_snapshot()  local
1451 		pending->error = btrfs_block_rsv_add(root,  in create_pending_snapshot()
1471 	parent_root = BTRFS_I(parent_inode)->root;  in create_pending_snapshot()
1509 	record_root_in_trans(trans, root, 0);  in create_pending_snapshot()
1510 	btrfs_set_root_last_snapshot(&root->root_item, trans->transid);  in create_pending_snapshot()
1511 	memcpy(new_root_item, &root->root_item, sizeof(*new_root_item));  in create_pending_snapshot()
1525 	memcpy(new_root_item->parent_uuid, root->root_item.uuid,  in create_pending_snapshot()
1539 	old = btrfs_lock_root_node(root);  in create_pending_snapshot()
1540 	ret = btrfs_cow_block(trans, root, old, NULL, 0, &old);  in create_pending_snapshot()
1550 	ret = btrfs_copy_root(trans, root, old, &tmp, objectid);  in create_pending_snapshot()
1559 	set_bit(BTRFS_ROOT_FORCE_COW, &root->state);  in create_pending_snapshot()
1611 	ret = qgroup_account_snapshot(trans, root, parent_root,  in create_pending_snapshot()
1705 	super->root = root_item->bytenr;  in update_super_roots()
1802 	ac->newtrans = btrfs_join_transaction(trans->root);  in btrfs_commit_transaction_async()
1880 	trace_btrfs_transaction_commit(trans->root);  in cleanup_transaction()
2274 	trace_btrfs_transaction_commit(trans->root);  in btrfs_commit_transaction()
2318 int btrfs_clean_one_deleted_snapshot(struct btrfs_root *root)  in btrfs_clean_one_deleted_snapshot()  argument
2321 	struct btrfs_fs_info *fs_info = root->fs_info;  in btrfs_clean_one_deleted_snapshot()
2328 	root = list_first_entry(&fs_info->dead_roots,  in btrfs_clean_one_deleted_snapshot()
2330 	list_del_init(&root->root_list);  in btrfs_clean_one_deleted_snapshot()
2333 	btrfs_debug(fs_info, "cleaner removing %llu", root->objectid);  in btrfs_clean_one_deleted_snapshot()
2335 	btrfs_kill_all_delayed_nodes(root);  in btrfs_clean_one_deleted_snapshot()
2337 	if (btrfs_header_backref_rev(root->node) <  in btrfs_clean_one_deleted_snapshot()
2339 		ret = btrfs_drop_snapshot(root, NULL, 0, 0);  in btrfs_clean_one_deleted_snapshot()
2341 		ret = btrfs_drop_snapshot(root, NULL, 1, 0);  in btrfs_clean_one_deleted_snapshot()